Efimosfermin alfa for F2- or F3-stage MASH

This study is testing a drug called efimosfermin alfa for people with MASH (Metabolic Dysfunction-Associated Steatohepatitis), a type of fatty liver disease, who have moderate to severe liver scarring (fibrosis, F2 or F3 stage). The goal is to see if efimosfermin alfa can help resolve the liver inflammation and damage, and improve long-term liver health, compared to a placebo (an inactive substance). Researchers will look for improvements in liver scarring and resolution of steatohepatitis after 52 weeks. They will also track liver-related health outcomes for up to 48 months. The study aims to enroll 1200 participants aged 18 to 75 years old who have MASH and at least two components of metabolic syndrome.

Study design
This is an interventional study comparing efimosfermin alfa to a placebo. It plans to enroll 1200 participants.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
Participants will be followed for liver-related clinical outcomes for up to 48 months after randomization.

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NCT07221227

A Pivotal Clinical Study to Investigate Efimosfermin Alfa in Participants With Biopsy-confirmed F2- or F3-stage MASH

Recruiting
PHASE3Ages 18–75InterventionalTreatment
GlaxoSmithKline
~1,200 participants
Updated 2026-07-27 on ClinicalTrials.gov
What's tested:Efimosfermin alfaPlacebo

At a glance

Recruiting sites
91 of 91 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Proportion of participants experiencing improvement in fibrosis by >=1 stage and no worsening of steatohepatitis at Week 52
Measured over At Week 52
+2 more outcomes measured
Non-alcoholic Fatty Liver Disease

NCT07221227

Where you'd take part

This study runs at 91 sites. They're the same protocol — you choose where, and that choice sets who your contact draft is addressed to.

  • GSK Investigational Site

    Chandler, Arizonastudy coordinator listed

    Recruiting

  • GSK Investigational Site

    Tucson, Arizonastudy coordinator listed

    Recruiting

  • GSK Investigational Site

    Little Rock, Arkansasstudy coordinator listed

    Recruiting

  • GSK Investigational Site

    Arcadia, Californiastudy coordinator listed

    Recruiting

  • GSK Investigational Site

    Covina, Californiastudy coordinator listed

    Recruiting

  • GSK Investigational Site

    Folsom, Californiastudy coordinator listed

    Recruiting

  • GSK Investigational Site

    Los Angeles, Californiastudy coordinator listed

    Recruiting

  • GSK Investigational Site

    Montclair, Californiastudy coordinator listed

    Recruiting

Sites open and close at different times, so the status above is per site — it can differ from the study's overall status.

  • GSK Clinical Trials · STUDY_DIRECTOR · GlaxoSmithKline
US GSK Clinical Trials Call Center
Email the study team

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  • Proportion of participants experiencing improvement in fibrosis by >=1 stage and no worsening of steatohepatitis at Week 52At Week 52

    Proportion of participants experiencing improvement in fibrosis of greater than or equal to (\>=) 1 stage by MASH clinical research network (CRN) fibrosis scores and no worsening of steatohepatitis (defined as no increase in nonalcoholic fatty liver disease activity score \[NAS\] for ballooning, inflammation, or steatosis) at 52 weeks will be assessed. MASH CRN fibrosis score ranges from 0 to 4, higher score indicates greater severity. NAS score ranges from 0 to 8, higher score indicates worse disease activity.

  • Proportion of participants experiencing resolution of steatohepatitis reading and no worsening of MASH CRN fibrosis score at Week 52At Week 52

    Resolution of steatohepatitis is defined as absence of fatty liver disease or isolated or simple steatosis without steatohepatitis and a NAS of 0 or 1 for inflammation, 0 for ballooning, and any value for steatosis. NAS score ranges from 0 to 8, higher score indicates worse disease activity. MASH CRN fibrosis score ranges from 0 to 4, higher score indicates greater severity.

  • Time from randomization to an adjudicated composite liver-related clinical outcomeFrom Randomization (Day 1) to 48 months

    Liver-related outcome will comprised of all-cause mortality; transplantation; occurrence of significant hepatic events.